Now in a new interview on ABC news yesterday, Giuliani said that other payments were not out of the question.

“The agreement with Michael Cohen, as far as I know, is a longstanding agreement that Michael Cohen takes care of situations like this then gets paid for them sometimes," he said.

Host George Stephanopoulos then asked: "So did Michael Cohen make payments to other women for the President?"

"I have no knowledge of that, but I would think if it was necessary, yes," Giuliani responded.

"He made payments for the President or he's conducted business for the President, which means he had legal fees, monies laid out and expenditures."

On Friday, as Trump spoke at an NRA convention, Giuliani put out a statement saying there’d been “no campaign violation” and that “the payment was made to resolve a personal and false allegation in order to protect the President’s family.”

Last week he told the Wall Street Journal that Trump had authorised him to announce the details of the payment, which he did in his initial interview with Fox News.

In another interview with the Washington Post he said the President was not told about the payment at the time “since it was somewhere between 10 and five days before the election”.

Scott Lucas, professor of international politics at the University of Birmingham, said that in their efforts to make the alleged affair “go away”, Trump and Giuliani had created more problems for themselves.

“Donald Trump and Rudy Giuliani, last week decided, without consulting any White House lawyers, that they’re going to make the Stormy Daniels affair go away,” he told Julia Hartley-Brewer.

“Rudy just did it again over the weekend. First of all, he has acknowledged that Donald Trump did know about the payoff to Stormy Daniels, which contradicts what Donald Trump has said for months.

“Secondly, Giuliani has admitted that it could be a campaign finance violation, because he said last thursday that it could have unsettled Trump in the last few weeks of the campaign.

“Then over the weekend, he said Stormy Daniels is ‘maybe’ not the only woman involved here.

“As lurid as it is, think it would have been lost in the swirl of how many other stories we have around Trump.

“But because Trump and Giuliani decided on this in-your-face, New York strategy, they’ve guaranteed they’ve got problems on this front as well as the Russian front for weeks to come.”

Special counsel Robert Mueller is still investigating alleged links between Russia and Trump’s election campaign.